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Ubuntu Security Notice USN-6535-1
December 06, 2023

curl vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 23.10
- Ubuntu 23.04
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in curl.

Software Description:
- curl: HTTP, HTTPS, and FTP client and client libraries

Details:

Harry Sintonen discovered that curl incorrectly handled mixed case cookie
domains. A remote attacker could possibly use this issue to set cookies
that get sent to different and unrelated sites and domains.
(CVE-2023-46218)

Maksymilian Arciemowicz discovered that curl incorrectly handled long file
names when saving HSTS data. This could result in curl losing HSTS data,
and subsequent requests to a site would be done without it, contrary to
expectations. This issue only affected Ubuntu 23.04 and Ubuntu 23.10.
(CVE-2023-46219)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 23.10:
   curl                            8.2.1-1ubuntu3.2
   libcurl3-gnutls                 8.2.1-1ubuntu3.2
   libcurl3-nss                    8.2.1-1ubuntu3.2
   libcurl4                        8.2.1-1ubuntu3.2

Ubuntu 23.04:
   curl                            7.88.1-8ubuntu2.4
   libcurl3-gnutls                 7.88.1-8ubuntu2.4
   libcurl3-nss                    7.88.1-8ubuntu2.4
   libcurl4                        7.88.1-8ubuntu2.4

Ubuntu 22.04 LTS:
   curl                            7.81.0-1ubuntu1.15
   libcurl3-gnutls                 7.81.0-1ubuntu1.15
   libcurl3-nss                    7.81.0-1ubuntu1.15
   libcurl4                        7.81.0-1ubuntu1.15

Ubuntu 20.04 LTS:
   curl                            7.68.0-1ubuntu2.21
   libcurl3-gnutls                 7.68.0-1ubuntu2.21
   libcurl3-nss                    7.68.0-1ubuntu2.21
   libcurl4                        7.68.0-1ubuntu2.21

In general, a standard system update will make all the necessary changes.

References:
   https://ubuntu.com/security/notices/USN-6535-1
   CVE-2023-46218, CVE-2023-46219

Package Information:
   https://launchpad.net/ubuntu/+source/curl/8.2.1-1ubuntu3.2
   https://launchpad.net/ubuntu/+source/curl/7.88.1-8ubuntu2.4
   https://launchpad.net/ubuntu/+source/curl/7.81.0-1ubuntu1.15
   https://launchpad.net/ubuntu/+source/curl/7.68.0-1ubuntu2.21